Samsung AM080FX A Series Service Manual page 189

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
■ IPM breakdown diagnostics (FAN PBA)
1. Preparations before checking
1) Power Off
2) IPM failure, discharge mode may not work properly. Therefore, wait more than 15 minutes after the Power Off.
3) Remove all of the Fan PBA connectors. ((FAN motor connector included.)
4) Prepare the digital multi tester.
2. Inspection Method
1) Refer to Figure1 and Table1, respectively the resistance value and diode voltage value measure.
2) According to the criterion in Table 1 to determine whether the failure of IPM.
Division
Measure
the resistance values
Measure the diode
voltage values
-
40
Samsung Electronics
Measured Point
+ -
40 U
40 V
40 W
U 34
V 34
W 34
U 40
V 40
W 40
34 U
34 V
34 W
+
Criterion
More than 500 ㏀
Measurement error can occur for reasons such as the ini-
0.3~0.7V
< Table 1 >
< Figure 1 >
Remark
tial
measurement condenser discharge.
Measured over at least three times.
FAN PCB
Fan PBA
34
201